Getting back the iframe data

if (IFrameObj.contentDocument) { // NS6
  IFrameDoc = IFrameObj.contentDocument; 
} else if (IFrameObj.contentWindow) { // IE5.5 and IE6
  IFrameDoc = IFrameObj.contentWindow.document;
} else if (IFrameObj.document) { // IE5
  IFrameDoc = IFrameObj.document;
} else {
  return true; // give up
}